How can I send and receive heart beat

[davidCcD]

In mqttjs, I use heart beat to keep connection alive, code like:

// send heart beat which is pingreq
client.value.on("packetsend", packet => {
console.log(
moment().format("YYYY-MM-DD HH:mm:ss") + send ${packet.cmd}
);
});
// receive heat beat which is pingresp
client.value.on("packetreceive", packet => {
console.log(
moment().format("YYYY-MM-DD HH:mm:ss") + receive ${packet.cmd}
);
});

Please let me know, how can I do these in mqtt - vue - hook ? Thank you!